Vehicle-lamp



Patented J 11116 14, 1921.

F. G WHITTINGTON. VEHICLE LAMP APPLICATION FILED DEC. 5. 1919.

UNITED STATES PATENT OFFICE.

FREDERIK G. WHITTINGTON, OF CHICAGO, ILLINOIS,, ASSIG-NOR TO STEWART- WARNER SPEEDOMETER CORPORATION, OF CHICAGO, ILLINOIS, A CORPO- BATION OF VIRGINIA.

VEHICLE-LAMP.

Specification of Letters Patent. Pat t d June 14 1921 Application filed December 5, 1919. Serial No. 342,586.

To all whom it may concern:

Be it known that I, FREDERIK Gr. lVHrr- TINGTON, a citizen of the United States, residing at the city of Chicago, in the county of Cook and the State of Illinois, have invented certain new and useful Improvements in ehicle-Lamps, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

This invention relates to an improved con.- struction for vehicle lamps of the type adapted to project a concentrated beam of light and mounted for quick adjustment of the lamp body with respect to its support for directing such beam as may be desired; the present construction further provides a readily disengageable connection between the support and the lamp to permit the use of the latter for various purposes about the vehicle with which it is associated and within the range permitted by the length of the wire connecting it with an electric current supply. It consists of the various features and elements of construction and their combinations which secure these results as hereinafter described and shown in the drawings and as indicated by the claims.

In the drawings:

Figure 1 is a horizontal axial section through the lamp body and a portion of its support, showing the remainder of its support in plan, the view being taken, as indicated, at line, 1-1, on Fig. 2.

Fig. 2 is a rear elevation of the'support showing also a portion of the lamp body carried thereby and with certain-parts of the support broken away and shown in section to indicate details of construction.

Fig. 3 is a transverse detail section taken as indicated at line, 3-3, on Fig. 1.

Fig. 4 is a detail view partly in section. showing a bushing for the switch button.

Fig. 5 is a perspective view of the socket.

tube.

Fig. 6 isalso a perspective view of the socket tube, showing it rotated through an angle of approximately 180 degrees upon its axis to disclose additional features of con struction.

Fig. 7 is a detail section taken as indicated at line, 7-7, on Fig. 1.

In the vehicle lamp illustrated in the drawings, the focusing reflector, 1, is formed on the inner surface of a metallic member wlnch constitutes also the inelosing body for the incandescent lamp bulb, 2. The inclosure is completed by a cover glass, 3, held in place by a retaining ring at, by means which are fully described in my application Serial o. 391,130, filed June 23, 1920, which is a division of this application, and are not to be claimed in. the present application.

A tubular neck, 1 1, is secured centrally to therear side of the member, 1, by means of its flange, 15, and at its opposite end is closed by a cup-shaped member, 16, telescoping within it and serving as a carrier for the socket tube, 17. At its rear end the latter 1s formed with three lugs, 18, bent to extend, transversely inward and against the inner surface of the end wall of the member, 16, ad acent a central opening therein. .A filler or bushing, 19, is fitted within the end of the tube, 17, with its reduced portion, 20, projecting between the lugs, 18, and through the central opening of the member, 16, and being clenched down upon the rear wall of the member, 16, topermanently unite the socket tube, 17, thereto. The opposite end of the tube is guided in a flange, 21, surrounding the small central aperture in the reflector, 1, and is formed with bayonet slots, 22, to receive the pins, 23, projecting from the base, 24, of the lamp, 2. The lamp base is provided with contact areas at its rear end, and these are connected into the electric circuit through yielding contact members, 25 and 26, mounted on. an insulating member, 27, which is lodged in a pair of diametrically opposite rectangular slots, 28, in the socket tube, 17,connection with asource of electric current supply being provided by lead wires, 29 and 30, one of which is connected directly in contact with the member, 25, while the other is secured under the nut of-a bolt, 31, positioned centrally in the insulating member, 27, with its head at the rear side of said member,'disposed for contact with the spring arm, 32, which is an extension of the contact member, 26, and

.through which the circuit is completed to the lamp. A push biitton, 33, is slid'ably mounted in the bore of the bushing, 19, with an insulating tip, 34, operatively engaging the spring contact arm, 32, clearance for -movement of the latter being provided by an opening, 35, in the socket tube, 17. The stem of. the button, 33, is formed with two adjacent grooves, 36 and 37 ,and the U-shaped member, 38, of spring wire accommodated in slots, 39, of the bushing, 19, and clearance apertures, 40, in the tube, 17 as shown in. Fig. 3, engages one or the other of the grooves, 36 and 37 serving as a detent to hold the push buttonat one or the other of its limiting positions.

Adjustment of the filament of the incandescent lamp, 2, to the focal center of the reflector, 1, is effected by sliding the member, 16, longitudinally within the neck, 14, which moves the socket tube, 17 along its axis sliding through the flange, 21, and carrying the lamp back and forth tion is determined. The neck, 14, is slotted at 41, to accommodate a clamping screw, 42, carried in the member, 16, and adapted to secure the parts firmly at adjusted position.

For mounting the lamp upon a support, it is provided with a tubular stem, 43, whose inturned flange, 44, is secured to the neck, 14, by means of an annular boss or flange, clenched down upon it, as shown in '%he means for adjustablysupporting the lamp upon the vehicle, appear in the drawings, but are the subject of my divisional application and are not to be claimed in this application, and will here.

I claim:

1. A searchlight comprising in combination, a reflector having a central lamp aperture; a substantially parallel-sided tubular stem extending rigidly from the rear side of the reflector encompassing the lamp aperture and exteriorly exposed for attachment to a' support; a cap closing the rear end of said stem and telescoping therewith for sliding adjustment therealong, and provided with means for securing it at any point within the range of said adjustment, and a socket tube of substantially less diameter than .the

until the correct posi-- not be further described.

-vice in said tube cap, co-axial therewith, affording annular interspace of substantial width between it and the cap throughout its length, and engaged with the head of the cap for axial adjustment with respect to the reflector by the telescoping adjustment of the cap and neck.

2. In the combination defined in claim 1, said end cap having a central aperture, the socket tube having an inwardly extending transverse portion adjacent such aperture and a filler in the tube having a shoulder holding said transverse portion against the end wall of the cap and with a reduced part extending through the aperture and clenched over on said end wall for attaching the tube thereto.

3. A vehicle lam comprising a concave beam-pro'ecting re ector axially apertured, a neck 0 larger diameter than such aperture secured to the back of the reflector and extending co-axially therefrom and a cylindrical shell closed at one end with its open end telescoping with the tubular neck, together with an inner tube having one end attached to the closed end of said shell and the other end slidably entered in the central aperture of the reflector, and formed to engage the base of a lamp bulb, and electrical contact devices and connections for such bulb carried by the tube and extending into the clearance space between the tube and the telescoping parts.

4. In the construction defined in claim 3, the closed end of said shell being aperture'd and fitted with a push button extending into the inner tube, and an electrical switch dearranged for operation by said push button.

In testimony whereof I have hereunto set my hand at Chicago, Illinois, this 16 day of October, 1919.

FREDERIK (i. WHITTINGTON. 

